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Hi,
I would like to know which settings that gives the best accuracy for a 27 dBm CW signal @ 869 MHz. Currently I use:
External 30(0.5W)+6(2W) = 36 dB attenuator (measured to be 36.6 dB).
Span 10 kHz.
RBW Shape: Flat top
1 kHz RBW and VBW.
Ref level of -5 dBm (less than 0 dBm).When I turn off the spur reject, I read a higher signal level, i.e. the DUT seems to have a higher output power.
Should I turn spur reject off for this type of measurement?
Are the other settings optimal for best accuracy?
Regards,
HCFor a CW signal, image/spur reject ON should provide slightly better accuracy. The readings should definitely be within 1 dB of each other (e.g. image/spur reject off may be 0.4 dB high, on may be 0.2 dB low).
Your other settings are perfect for this measurement.
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